1999-2004 Honda TRX400EX FourTrax Service Manual, Page 244Get this manual
ELECTRIC STARTER INSTALLATION Coat new O-ring with oil and install it into the starter motor groove
Install the starter motor into the left crankcase cover and onto the crankcaseInstall the cable guide and mounting bolts, and tighten the bolts securelyInstall the starter motor cable and terminal nut onto the motor terminal and tighten the nut securelyInstall the rubber cap over the motor terminal securely
STARTER RELAY SWITCH
INSPECTION
Shift the transmission into neutralTurn the ignition switch ONPush the starter switchThe coil is normal if the starter relay switch clicks